| phuchuynh |
June 8, 2011 06:50 |
Discretisation schemes and solution (keyword) ???
Hi !
I am new to using OpenFoam 1.7.1. I want to learn how to use it better. To start , I am considering GUI's for OpenFoam. However, I am having some trouble. For example :
1 / Key word of Schemse : " default Euler , Gauss linear, Gauss limitedLinearV, Gauss vanLeer,......"
Code:
ddtSchemes
{
default Euler;
}
gradSchemes
{
default Gauss linear;
}
divSchemes
{
div(rho*phi,U) Gauss limitedLinearV 1;
div(phi,alpha) Gauss vanLeer;
div(phirb,alpha) Gauss interfaceCompression;
}
laplacianSchemes
{
default Gauss linear corrected;
}
interpolationSchemes
{
default linear;
}
snGradSchemes
{
default corrected;
}
fluxRequired
{
default no;
p_rgh;
pcorr;
alpha1;
}
2/ Key word of Solution : " PCG , DIC, PBiCG,......"
Code:
solvers
{
pcorr
{
solver PCG;
preconditioner DIC;
tolerance 1e-10;
relTol 0;
}
p_rgh
{
solver PCG;
preconditioner DIC;
tolerance 1e-07;
relTol 0.05;
}
p_rghFinal
{
$p_rgh;
tolerance 1e-07;
relTol 0;
}
U
{
solver PBiCG;
preconditioner DILU;
tolerance 1e-06;
relTol 0;
}
}
PISO
{
momentumPredictor no;
nCorrectors 3;
nNonOrthogonalCorrectors 0;
nAlphaCorr 1;
nAlphaSubCycles 2;
cAlpha 1;
}
I don't know how to use it. what does keyword mean ? How do I use them?
3/ Where are governing equations ? and how can I repair them to creat new solver ?
Plz help me ! can suggest other GUI's. Thank you
Best regards ! :) |
